59 lines
1.6 KiB
JavaScript
59 lines
1.6 KiB
JavaScript
import SortKey from "../../sortkey.js";
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export default class RoomTimelineStore {
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constructor(timelineStore) {
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this._timelineStore = timelineStore;
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}
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async lastEvents(roomId, amount) {
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return this.eventsBefore(roomId, SortKey.maxKey, amount);
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}
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async firstEvents(roomId, amount) {
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return this.eventsAfter(roomId, SortKey.minKey, amount);
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}
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eventsAfter(roomId, sortKey, amount) {
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const range = IDBKeyRange.bound([roomId, sortKey.buffer], [roomId, SortKey.maxKey.buffer], true, false);
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return this._timelineStore.selectLimit(range, amount);
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}
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async eventsBefore(roomId, sortKey, amount) {
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const range = IDBKeyRange.bound([roomId, SortKey.minKey.buffer], [roomId, sortKey.buffer], false, true);
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const events = await this._timelineStore.selectLimitReverse(range, amount);
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events.reverse(); // because we fetched them backwards
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return events;
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}
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// should this happen as part of a transaction that stores all synced in changes?
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// e.g.:
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// - timeline events for all rooms
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// - latest sync token
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// - new members
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// - new room state
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// - updated/new account data
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appendGap(roomId, sortKey, gap) {
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this._timelineStore.add({
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roomId: roomId,
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sortKey: sortKey.buffer,
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event: null,
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gap: gap,
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});
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}
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appendEvent(roomId, sortKey, event) {
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console.info(`appending event for room ${roomId} with key ${sortKey}`);
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this._timelineStore.add({
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roomId: roomId,
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sortKey: sortKey.buffer,
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event: event,
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gap: null,
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});
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}
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// could be gap or event
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async removeEntry(roomId, sortKey) {
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this._timelineStore.delete([roomId, sortKey.buffer]);
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}
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}
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